Question: Who was Barbara Walters's spouse and when did the marriage end?
Paraphrase: Who was the spouse of Barbara Walters and when was the end of the marriage?
SPARQL (Wikidata): SELECT ?value1 ?obj WHERE { wd:Q231417 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P582 ?value1 . }